Grate-bar



(No Model.)

No. 394,114. Patented Dec. 4, l8

,13 3 1 2 z I i l f .7.

UNITED STATES PATENT ()EEIcE.

CLEEMENTINA J. M. HAYNA, OF ST. LOUIS, MISSOURI.

G RAT E- BAR.

SPECIFICATION forming part of Letters Patent No. 394,114, dated December 4, 1888.

Application filed January 15, 1887- Serial No. 224,499. (No model.)

To aZZ whom it may concern.-

Be it known that I, CLEEMENTINA J. M. HAirNA, of St. Louis, Missouri, have made a new and useful Improvement in Grate-Bars, of which the following is a full, clear, and exact description.

The novelty in the present instance consists in the structure of the bar and its combination with the supporting parts, all as will be fully described, as well as illustrated in the annexed drawil'igs, making part of this specification, in which Figure 1 a view in perspective of the improved bar. Fig. 2 is a cross vertical section of the bar on the line 2 2 of Fig. Fig. 3 is a vertical section on the line 3 3 of Fig. 2. Fig. 4 is a front elevation of a boiler whose furnace is provided with the improved bars, and Fig. 5 is a vertical longitudinal section on the line 5 5 of Fig. l.

The same letters of reference denote the same parts.

A A represent the plates, which are placed or made at right angles to the length of the bar, and, by means of the connecting portions B B, are united to form the improved grate-bar.

C 0 represent the vertical air-fines, respectively between the plates A A. By means of the notches D the plate projections a ctwo, three, four, or more-are formed. These notches throughout the series of plates being in line, the horizontal air-fines E are thereby formed in the bar.

The crowning of the bar may be effected by curving the plates at the upper edge substantially shown, although I desire not to be restricted to any particular curve or slant from the apex of the bar. The bevel of the plates at the top is shown at a, and the grooves of the plate projections are shown at (L The notches D widen downward, substantially as shown more distinctly in Fig. 2 at d, and the bevelin g of the notches is shown at d. The tapering of the plates A from the top downward is shown more distinctly at a Fig. 3, and-the rounded bottom a of the plates is shown in Figs. 1, 2, and 4:.

Any desired number of the bars may be combined in a furnace, F, Figs. 4 and 5.

G G represent the bar-supports, which, as stated, may-'be rounded at g. The bars at the forward end may be provided with a squared projection, II, which may extend to the outside of the furnace and to which a wrench, I, Figs. 4. and 5, may be applied when it is desired to rock the bars.

All of the above-named features may be used in conjunction in the same grate-bar, if desired. The bar, having one or more or all of said features, is conveniently made in the form of a single casting.

These improved grate-bars can be adapted to rectangular or round furnaces.

The projections a are'uset'ul in many forms of grate-bars.

I claim 1. A grate-bar composed of the plates A A, notched at D, and united by means of the portions B B, the plates being arranged vertically and at right angles to the length of the bar and being spaced apart from each other, as and for the purpose described.

2. In a grate-bar, the combination of the vertically-arranged fuel-supporting plates A A, spaced apart, forming air-flues C, and notched at their upper edges, as at D, the notches of each being in line with those of the others, forming horizontal air-fines E, and means for supporting said plates, substantially as described.

33. In a grate-bar, the combination of the horizontal portions B and vertical plates A, arranged at right angles to said portions and supported thereby, said plates being spaced apart, forming air-fines C, grooved at D,f0r1ning horizontal air-fines E, and beveled at a, substantially as described.

CLEEMENTINA J. M. HAYNA.

Witnesses:

C. D. MOODY, B. F. REX. 

